Blackrock and Vanguard own surprisingly large portions of Rheinmetall, Siemens, Airbus, SAP and other German government/defense/security contractors. If avoiding their investments is the goal, there’s a lot of work to do.
blackrock and vanguard do index funds, yeah? They have substantial investments in everything on the market that's doing well enough to get on indexes. I don't see how you can avoid that?
Of course, that's the whole plan. The thing about index funds people don't see is they're giving away the voting rights to institutions controlled by who knows...